[問題]GWD-7-7

[Jade]

sorry.... I know this might be a stupid question... but I cannot get the roght answer anyhow :-S Please help.... Thanks in advance!

Q7:
On an aerial photograph, the surface of a pond appears as circular region of radius inch. If a distance of 1 inch on the photograph corresponds to an actual distance of 2 miles, which of the following is the closest estimate of the actual surface area of the pond, in square miles?

A. 1.3
B. 2.4
C. 3.0
D. 3.8
E. 5.0

Answer: B

[homaru]

分數漏掉嚕
Q7:
On an aerial photograph, the surface of a pond appears as circular region of radius 7/16 inch. If a distance of 1 inch on the photograph corresponds to an actual distance of 2 miles, which of the following is the closest estimate of the actual surface area of the pond, in square miles?

半徑=(7/16)*2=7/8(miles)
面積=兀*r[sup]2[/sup]=3.14*(7/8)[sup]2[/sup]=2.404....

[mcpopcorn2001]

分數漏掉嚕
Q7:
On an aerial photograph, the surface of a pond appears as circular region of radius 7/16 inch. If a distance of 1 inch on the photograph corresponds to an actual distance of 2 miles, which of the following is the closest estimate of the actual surface area of the pond, in square miles?

半徑=(7/16)*2=7/8(miles)
面積=兀*r[sup]2[/sup]=3.14*(7/8)[sup]2[/sup]=2.404....

可以麻煩翻譯一下中文嗎?
看不太懂ㄝ...
謝謝喔!

[flcl]

分數漏掉嚕
Q7:
On an aerial photograph, the surface of a pond appears as circular region of radius 7/16 inch. If a distance of 1 inch on the photograph corresponds to an actual distance of 2 miles, which of the following is the closest estimate of the actual surface area of the pond, in square miles?

半徑=(7/16)*2=7/8(miles)
面積=兀*r[sup]2[/sup]=3.14*(7/8)[sup]2[/sup]=2.404....

可以麻煩翻譯一下中文嗎?
看不太懂ㄝ...
謝謝喔!

1inch=2miles
半徑=7/16 inch =7/8miles

給你半徑求面積 ..就醬